Two rams smash heads together trying to gain dominance. If ram A has a mass of 10 kg and is moving east at 3 m/s, and ram B (who is larger) smashes into it and causes ram A to have a westward velocity of 5 m/s after the
collision, what was the change in momentum of ram A?

Which of the following correctly describes what happens when an atomic bomb explodes? small pieces of fissionable material are joined and form a body with a mass greater than the critical mass, the relative number of neutrons escaping decreases, and a chain reaction and explosion result. large pieces of fissionable matter are brought together quickly and form a body with a mass smaller than the critical mass, the relative number of escaping neutrons increases, and a chain reaction and explosion result.

What was the first instrument to ever record an earthquake?

By what primary heat transfer mechanism does the sun warm the earth?